East Hampton, LI $6.4 million
Talk about a “stunning waterfront opportunity”: Here’s your chance to live along 126 feet of “open, unobstructed” harbor beachfront, and get “sunset views” from Shelter Island to the Cedar Point Lighthouse to Connecticut “and beyond.” And while the “untouched landscape” is preserved “the way the Hamptons used to be,” the six-bedroom, five-bathroom, 5,648-square-foot home has been gutted and refashioned with a “huge” master suite, “contemporary” bathrooms, a “family-style” eat-in kitchen, two fireplaces and a mahogany deck overlooking the 1.3-acre property. Agent: Lori Barbaria, Prudential Douglas Elliman, 516-702-5649

Upper East Side $6.5 million
This “elegant” postwar duplex on Fifth Avenue boasts a “master wing” on its upper level, with a balcony featuring “direct” views of Central Park. The lower level offers 42 feet of continuous windows with the same “magnificent” park views. Altogether, there is 3,980 square feet of space, including a “spacious” windowed kitchen with its own Upper East Side views. There are a total of five bedrooms and 5 1/2 bathrooms, as well as an office and sitting room. Agents: Diane Abrams and Felise Gross, Brown Harris Stevens, 212-588-5605 and 212-588-5681

Amangansett, LI $5.995 million
You might have seen this “very special” house in the pages of Town & Country and Elle Decor, but now it’s officially a Dream Home. Built by architect James D’Auria in 1998 as his own home, this “modern interpretation” of a barn offers a “flowing, open” plan with features such as a two-story living room “surrounded” by windows, plus an “unusual” studio that opens at its far end into landscaped gardens and a “wildflower-planted” meadow. The house features four fireplaces — in the “incredible” chef’s kitchen, the living room, the master bedroom (one of four bedrooms) and even out on the patio that overlooks the “great” lawns. Agent: Jennifer D’Auria, Halstead Property, 631-324-6100, ext. 356